Method for setting delay-dependent switching points

摘要

One method of adjusting lag dependent shift points to maintain a minimum target turbine speed includes calculating a vehicle speed offset based on the vehicle acceleration rate, a predicted minimum turbine RPM retard delay, and converting the minimum target turbine speed to a desired vehicle speed based on the delay condition. Thereafter, the method continues with determining a target gear based on the vehicle speed offset and the vehicle target speed and downshifting to the target gear at a vehicle speed that is less than or equal to the current turbine speed. The method ends with maintaining the target gear until a shift delay time is greater than a predetermined delay threshold.